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Finding the Fourth Proportional to 1,491.63, 2,235.32 and 711.00

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Solution

The fourth proportional to 1,491.63, 2,235.32 and 711.00 is: 1,065.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.63 : 2,235.32 = 711.00 : x
  2. Step 2: Convert to fraction form
    1,491.63/2,235.32 = 711.00/x
  3. Step 3: Cross multiply
    1,491.63x = 2,235.32 × 711.00
  4. Step 4: Simplify right side
    1,491.63x = 1,589,303.82
  5. Step 5: Solve for x
    x = 1,589,303.82/1,491.63
  6. Step 6: Final answer
    x = 1,065.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.